As you may know, the current stable version of Debian (8.1 "jessie")
does not have a realtime kernel packaged by debian.org, because the
kernel version they selected (3.16) never got an rt patchset.
However, Debian testing currently is based on linux kernel 4.1.3, and
there is a matching rt patchset already included in the Debian package.
I have rebuilt this package for Debian 8.1 amd64, and boot-tested it on
one machine (my laptop), where I get OK but not great realtime
performance (around 100us on a 5-hour test), but as I don't have any
results for other rt kernel versions on this hardware it's not a great
test.
$ uname -a
Linux babs 4.1.0-1-rt-amd64 #1 SMP PREEMPT RT Debian 4.1.3-1.1 (2015-08-14)
x86_64 GNU/Linux
As far as I know, the package would rebuild for 32-bit machines with
no trouble.
The package repository is
deb http://media.unpythonic.net/debs/ jessie/
deb-src http://media.unpythonic.net/debs/ jessie/
and it's signed with the public key C0873E61 "Jeff Epler (Package
signing key) <jep...@unpythonic.net>" which is included below.
At some point I'll delete and recreate this repository. I made the
unfortunate decision to mix non-Free (but redistributable) packages into
the same repository, namely the nvidia proprietary video drivers also
backported from debian testing. When I recreate it, I'll make sure the
division between Free and non-Free is clear, or just skip the
proprietary stuff entirely. So please don't depend on the longevity of
the above-named package archives.
There is not presently a pre-built linuxcnc package for debian jessie
amd64, so you'll also have to build that for yourself.
If you do try out these packages, please report your realtime results on
the mailing list.
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